[Qemu-devel] Re: playing with qemu's 8139 nic and FreeBSD (loopback mode missing?)

[Juergen Lock]

On Fri, Apr 28, 2006 at 08:25:02PM +0400, Igor Kovalenko wrote:
> Juergen Lock wrote:
> > I played with
> >     qemu -monitor stdio -m 256 -cdrom 6.1-RC1-i386-disc1.iso -usb -soundhw 
> > es1370 -kernel-kqemu -net nic,model=rtl8139 -net user
> > and got it as far as
> >     re0: diagnostic failed, failed to receive packet in loopback mode
> > (followed by a panic :) with the (experimental) patches below.
> > 
> >  Anyone in the mood to implement loopback mode for this nic?
> > 
> >  Hmm actually...  I just found the original posting in the archive,
> > is C+ mode implemented now?  If not re is probably not what I want,
> 
> The rtl8139 is set up with PCI rev ID 0x20 which should be enough for OS 
> driver
> to detect C+ mode features. C+ mode is OK, tested with Linux driver.

Cool, so I want FreeBSD's re driver.  That one checks TxConfig
tho, as changed in my patch (inside #if 0).  And when changed,
it still doesn't work as mentioned above because the driver expects
loopback mode to be working.
> 
> > but the rl driver that it attaches without that #if 0'd (now) hunk
> > below doesnt seem to be able to get data thru either and I get
> >     rl0: watchdog timeout
> > in dmesg, which usually means the driver doesnt receive interrupts.
> > 
> >  What the heck, I'll append a log of a run just doing in fixit->cdrom:
> >     ifconfig rl0 10.0.2.15
> > and then exiting (which is enough to trigger the watchdog timeout...)
> > 
> 
> I'm too lasy to test with fresh freebsd installation :)

 No need to install FreeBSD, you can get away by just using
fixit mode of an install iso, i.e. disc1.  (which actually is
what I did above. :)

 You can look at 6.1RC's re driver here:
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/re/if_re.c?annotate=1.46.2.14
 which includes:
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/pci/if_rlreg.h?annotate=1.51.2.3

 And 6.1RC disc1 iso is e.g. here:
ftp://ftp.ru.freebsd.org:/pub/FreeBSD/ISO-IMAGES-i386/6.1/6.1-RC1-i386-disc1.iso